diff -urN linux-4.9.239/kernel/kmod.c linux-4.9.239-patched/kernel/kmod.c
--- linux-4.9.239/kernel/kmod.c 2020-10-14 08:48:17.000000000 +0100
+++ linux-4.9.239-patched/kernel/kmod.c 2020-10-26 18:39:30.289915349 +0000
@@ -570,7 +570,8 @@
                call_usermodehelper_freeinfo(sub_info);
                return -EINVAL;
        }
-       helper_lock();
+       if (!(current->flags & PF_FREEZER_SKIP))
+               helper_lock();
        if (usermodehelper_disabled) {
                retval = -EBUSY;
                goto out;
@@ -604,7 +605,8 @@
 out:
        call_usermodehelper_freeinfo(sub_info);
 unlock:
-       helper_unlock();
+       if (!(current->flags & PF_FREEZER_SKIP))
+               helper_unlock();
        return retval;
 }
 EXPORT_SYMBOL(call_usermodehelper_exec);